Choose the right record, custodian and access route before placing a request.
NYC DORIS records requests work best when the material being sought is clearly identified. A property card order, an appointment to view archival plans and a FOIL request are different routes. Defining the research question first helps an owner avoid duplicate requests and gives archive staff the information needed to identify potentially relevant holdings.
Before requesting material, write down what the project team needs to establish. Examples include locating an earlier building plan, obtaining a historical property card or reviewing a government report cited in an older file. Identify the property separately from the research question so a broad address search does not become a substitute for specifying the document.
A useful preparation list includes the current address, borough, block and lot; any known former address or parcel reference; approximate dates; and available application, folder, drawing or catalogue numbers. Note which details are confirmed and which are search leads. Keeping those distinctions visible helps staff understand the request without turning an uncertain reference into an asserted fact.
DORIS’s Collections page links its collection guides and digital collections. Collection guides describe holdings, while digital collections provide access to available digitized items. Check both kinds of resource when relevant. A collection description can indicate where to look without establishing that every associated item is available as an online download.
For a property project, maintain a simple search log recording the source checked, identifiers used and result. Retain useful catalogue references even when a scan is unavailable. That information gives a subsequent staff inquiry a starting point and helps prevent repeating the same search.
DORIS provides dedicated ordering routes for property cards and collection prints. Confirm the property identifiers, requested format and any certification requirement before submitting an order. Different reproduction and certification categories appear in the agency’s fee schedule, so use the current order information to establish the applicable charges.
DORIS’s current FAQ strongly encourages research appointments. It directs researchers to create an account in the Municipal Library & Archives Request System and submit a new request with a proposed appointment. Reference staff review the request and confirm arrangements. Some material is held at the Industry City facility in Brooklyn, so the correct research location depends on the records.
The FAQ also describes a reproduction-request option through the research account. Staff provide pricing information before chargeable digitization begins. Condition or legal restrictions may prevent reproduction of some material. Confirm whether a suitable copy can be supplied before making it a fixed dependency in a filing schedule.
OpenRecords is the City’s platform for Freedom of Information Law requests to NYC agencies. DORIS instructs requesters to use it for FOIL requests to DORIS. That does not make DORIS the custodian of every government record: DOB, for example, expressly instructs requesters to select the Department of Buildings for DOB FOIL requests.
Check the responsible agency’s ordinary public-record access options first. DOB provides a records-request route through DOB NOW: BIS Options for specified documents, including plans and folders. The existence of OpenRecords does not mean every routine drawing request needs a FOIL submission.
NYC Property Cards and Certified Copies
Historical assessment information and copy-format considerations, often relevant to LNO documentation.
Historical permit folders and related paperwork used to trace applications and changes.
Historical application summaries and identifiers that can guide a more targeted file search.
NYC Historical Property Assessment Records
Historical assessment ledgers and related records that can add dated ownership, valuation or building-description clues.
Earlier building images that can support facade, restoration and building-history research.
Selected archival drawings and plan collections, including Lower Manhattan holdings with defined coverage limits.
NYC Historical Maps and Atlases
Earlier streets, parcels and mapped building footprints used to compare changes over time.
Combine DORIS, DOB and other sources into a dated chronology that identifies findings, conflicts and remaining questions.
NYC Letter of No Objection Records Research
Organize historical evidence that may support a separate DOB LNO review; DOB remains the decision-making agency.
NYC Historic Building Research for LPC Applications
Use tax photographs, plans, designation material and other historical evidence to support restoration and LPC project preparation.
NYC DORIS Records Requests and Archive Access
Choose the correct custodian, request route, appointment or reproduction process for the material needed.
NYC Municipal Library Research for Building Projects
Research City-government publications and historical reports that can add context to a building question.
Historical references can differ from the identifiers used today. If an address or lot may have changed, explain the uncertainty and supply the supporting reference rather than submitting several unrelated properties as one request. Record any staff clarification so later copies remain connected to the correct building.
For a practical request description, state the document type, approximate period, property identifiers and known record references. Explain the desired output, such as inspection of the original, a digital reproduction or a certified copy where available. These are recommended scoping practices; the selected agency or archive form controls its required fields.
Save the confirmation, request number, staff correspondence and received files together. A useful tracking record distinguishes submitted, awaiting clarification, ready for review, copied and unresolved items. If the response identifies another custodian or a narrower collection, record that as the next action rather than marking the research complete.
When copies arrive, check legibility and identifiers before circulating them. Preserve the supplied files and make annotations on working copies. Record missing sheets and ambiguous dates. A partial response may still be useful, but the project team should be able to see exactly what was obtained and what remains unanswered.
SLK Buildings can discuss which records would help answer a building-documentation question and coordinate an organized request plan. The scope should distinguish agency charges, research effort, copy requirements and subsequent professional review. Access to a record does not itself establish permit compliance or agency acceptance of a proposed use or alteration.
If your building project depends on historical records or an unresolved documentation question, contact SLK Buildings to discuss the research and coordination that may be appropriate. Share the property address, relevant identifiers, records already available and the decision the information needs to support.
Contact SLK Buildings to Discuss Your Project
212-888-3888 | info@slkbuildings.com
Disclosure: SLK Buildings is a private consulting and construction-management firm and is not affiliated with NYC DORIS, NYC DOB, NYC LPC, or any government agency. Record availability and agency determinations remain with the responsible public agency.
Given the complexity of locating and interpreting historical New York City property records, property owners, developers, and design professionals may benefit from qualified assistance when researching records maintained by the NYC Department of Records and Information Services (DORIS). Identifying the appropriate records early can help clarify a property’s history and determine what additional documentation may be needed for a building project.
At SLK Buildings, we’ve spent over 25 years helping NYC homeowners, property owners, developers, and businesses navigate agency requirements, research building records, organize supporting documentation, and coordinate project filings. Our team can assist with research involving NYC property cards, historical tax photographs, historical building plans, docket books, maps, and other municipal records that may provide useful evidence about a property’s history.
Whether you’re researching a building’s historical use, preparing supporting documentation for a Letter of No Objection, documenting historic conditions for an LPC project, or trying to understand earlier building records, SLK Buildings can help organize the research and identify the records relevant to your project.
SLK Buildings assists Home Owners, Property Owners, Developers, and Design Professionals with NYC DORIS building and property records research:
SLK Buildings provides free educational content to help property owners understand their research options.
For those who prefer professional assistance, we’re available to coordinate records research, organize supporting documentation, and help determine how historical records may relate to the applicable NYC agency process.
Disclosure: SLK Buildings is a private consulting and construction-management firm and is not affiliated with NYC DORIS or any government agency. Historical records can support research and documentation, but the responsible agency makes any required determination or approval.
No. DOB maintains its own building records and request routes, and other agencies hold their records. DORIS is relevant where its historical collections contain the material sought. Identify the likely custodian before selecting an ordering or FOIL route.
DORIS provides a dedicated property-card ordering route. Check that route and the required copy format first. FOIL is a separate records-access process and should not be presented as the standard first step for every archival order.
DORIS strongly encourages appointments so staff can prepare relevant material. Use the current research-account instructions and wait for confirmation of the records and location. Holdings at Industry City may require a different reading room from the one initially expected.
Do not assume that. Check the available format, reproduction conditions and certification options for the specific record. The fee schedule distinguishes copy types, and DORIS warns that fragile condition or legal restrictions can prevent reproduction.
Confirm the applicable agency charge, requested format, certification and any reproduction work before ordering. Research coordination and the agency’s copying charges are separate considerations. Where pricing needs clarification, obtain an answer for the specific request rather than relying on a general estimate.
It means the result should be reviewed against the request’s scope and identifiers. Consider whether another date, address reference or custodian is relevant. A missing record does not, by itself, prove that work was lawful or that an approval never existed.
